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    <title>Document</title>
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<body>
    <script>
        // 1.将数组map，filter，reduce，every改写成箭头函数形式

        const arr = [1, 2, 3, 4, 5, 6]

        const arr1 = arr.map(
            (element) => {
                return element + 1
            }
        )
        console.log(arr1);

        const new_arr = arr.filter(
            (e) => {
                return e % 2 == 0  //true：返回 false：不符合条件=>过滤
            }
        )

        var sum = arr.reduceRight(
            (v1, v2) => {
                return v1 * v2
            }
        )

        var isMatch = arr.every(
            (e) => {
                return e > 1
            }
        )
    </script>
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